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Stress, the Stress System and the Role of Glucocorticoids

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https://www.readbyqxmd.com/read/28612935/early-adversity-and-brain-response-to-faces-in-young-adulthood
#1
Johannes Lieslehto, Vesa Kiviniemi, Pirjo Mäki, Jenni Koivukangas, Tanja Nordström, Jouko Miettunen, Jennifer H Barnett, Peter B Jones, Graham K Murray, Irma Moilanen, Tomáš Paus, Juha Veijola
Early stressors play a key role in shaping interindividual differences in vulnerability to various psychopathologies, which according to the diathesis-stress model might relate to the elevated glucocorticoid secretion and impaired responsiveness to stress. Furthermore, previous studies have shown that individuals exposed to early adversity have deficits in emotion processing from faces. This study aims to explore whether early adversities associate with brain response to faces and whether this association might associate with the regional variations in mRNA expression of the glucocorticoid receptor gene (NR3C1)...
June 14, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28591825/corticotrophin-releasing-hormone-and-corticosterone-impair-development-of-preimplantation-embryos-by-inducing-oviductal-cell-apoptosis-via-activating-the-fas-system-an-in-vitro-study
#2
Xiu-Wen Tan, Chang-Li Ji, Liang-Liang Zheng, Jie Zhang, Hong-Jie Yuan, Shuai Gong, Jiang Zhu, Jing-He Tan
STUDY QUESTION: What are the mechanisms by which corticotrophin-releasing hormone (CRH) and corticosterone impair the development of preimplantation embryos in the oviduct. SUMMARY ANSWER: CRH and corticosterone do not affect preimplantation embryos directly, but impair their development indirectly by triggering apoptosis of oviductal epithelial cells (OECs) through activation of the Fas system. WHAT IS KNOWN ALREADY: Studies report that stress impairs embryo development with facilitated secretion of CRH and glucocorticoids...
June 7, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28558479/mechanisms-of-mitochondrial-redox-signaling-in-psychosocial-stress-responsive-systems-new-insights-into-an-old-story
#3
Thomas Meyer, Petra H Wirtz
SIGNIFICANCE: Psychosocial stress is associated with alterations in serum glucocorticoids and cytokines, such as interleukin-6 (IL-6) and IL-1β, which functionally interact. However, the molecular mechanisms and physiological relationship between the two systems within the context of stress exposure are not well characterized. Recent Advances: Extracellular IL-6, which stimulates the release of cortisol from the zona fasciculata of the adrenal cortex, mediates its intracellular effects by tyrosine phosphorylation of the transcription factor STAT3 (signal transducer and activator of transcription 3)...
May 30, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28551512/systemic-n-terminal-fragments-of-adrenocorticotropin-reduce-inflammation-and-stress-induced-anhedonia-in-rats
#4
Dmitrii D Markov, Ksenia A Yatsenko, Lyudmila S Inozemtseva, Igor A Grivennikov, Nikolai F Myasoedov, Oleg V Dolotov
Emerging evidence implicates impaired self-regulation of the hypothalamic-pituitary-adrenal (HPA) axis and inflammation as important and closely related components of the pathophysiology of major depression. Antidepressants show anti-inflammatory effects and are suggested to enhance glucocorticoid feedback inhibition of the HPA axis. HPA axis activity is also negatively self-regulated by the adrenocorticotropic hormone (ACTH), a potent anti-inflammatory peptide activating five subtypes of melanocortin receptors (MCRs)...
May 7, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28530340/-can-post-traumatic-stress-disorder-be-prevented-with-glucocorticoids
#5
REVIEW
Hagit Cohen, Zeev Kaplan, Joseph Zohar
Glucocorticoids (GCs) play a major role in orchestrating the complex physiological and behavioral reactions essential for the maintenance of homeostasis. These compounds enable the organism to prepare for, respond to and cope with the acute demands of physical and emotional stressors. The appropriate GC release, commensurate with stressor severity, enables the body to properly contain stress responses so as to promote recovery by rapidly restoring homeostasis. Indeed, inadequate GC release following stress not only delays recovery by disrupting biological homeostasis in the short run but can also interfere with the processing or interpretation of stressful information that results in long-term disruptions in memory integration...
December 2016: Harefuah
https://www.readbyqxmd.com/read/28527570/mechanisms-of-glucocorticoid-action-during-development
#6
Jonathan T Busada, John A Cidlowski
Glucocorticoids are primary stress hormones produced by the adrenal cortex. The concentration of serum glucocorticoids in the fetus is low throughout most of gestation but surge in the weeks prior to birth. While their most well-known function is to stimulate differentiation and functional development of the lungs, glucocorticoids also play crucial roles in the development of several other organ systems. Mothers at risk of preterm delivery are administered glucocorticoids to accelerate fetal lung development and prevent respiratory distress...
2017: Current Topics in Developmental Biology
https://www.readbyqxmd.com/read/28512033/bifidobacterium-cect-7765-modulates-early-stress-induced-immune-neuroendocrine-and-behavioral-alterations-in-mice
#7
A Moya-Pérez, A Perez-Villalba, A Benítez-Páez, I Campillo, Y Sanz
Emerging evidence suggests that there is a window of opportunity within the early developmental period, when microbiota-based interventions could play a major role in modulating the gut-brain axis and, thereby, in preventing mood disorders. This study aims at evaluating the effects and mode of action of Bifidobacterium pseudocatenulatum CECT 7765 in a murine model of chronic stress induced by maternal separation (MS). C57Bl/6J male breast-fed pups were divided into four groups, which were subjected or not to MS and supplemented with placebo or B...
May 13, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28511026/hdac2-is-required-by-the-physiological-concentration-of-glucocorticoid-to-inhibit-inflammation-in-cardiac-fibroblasts
#8
Haining Zhang, Yanhua He, Guiping Zhang, Xiaobin Li, Suikai Yan, Ning Hou, Qing Xiao, Yue Huang, Miaoshan Luo, Genshui Zhang, Quan Yi, Minsheng Chen, Jiandong Luo
We previously suggested that endogenous glucocorticoids (GCs) may inhibit myocardial inflammation induced by lipopolysaccharide (LPS) <i>in vivo</i>. However, the possible cellular and molecular mechanisms were poorly understood. In this study, we investigated the role of physiological concentration of GCs in inflammation induced by LPS in cardiac fibroblasts and explored the possible mechanisms. The results showed that hydrocortisone at the dose of 127ng/ml (equivalent to endogenous basal level of glucocorticoids) inhibited LPS (100ng/ml)-induced productions of TNF-α and IL-1β in cardiac fibroblasts...
May 16, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28502781/checks-and-balances-the-glucocorticoid-receptor-and-nf%C3%A4-b-in-good-times-and-bad
#9
REVIEW
Mandakh Bekhbat, Sydney A Rowson, Gretchen N Neigh
Mutual regulation and balance between the endocrine and immune systems facilitate an organism's stress response and are impaired following chronic stress or prolonged immune activation. Concurrent alterations in stress physiology and immunity are increasingly recognized as contributing factors to several stress-linked neuropsychiatric disorders including depression, anxiety, and post-traumatic stress disorder. Accumulating evidence suggests that impaired balance and crosstalk between the glucocorticoid receptor (GR) and nuclear factor kappa-light-chain-enhancer of activated B cells (NFκB) - effectors of the stress and immune axes, respectively - may play a key role in mediating the harmful effects of chronic stress on mood and behavior...
July 2017: Frontiers in Neuroendocrinology
https://www.readbyqxmd.com/read/28472640/cytokine-profile-of-nalt-during-acute-stress-and-its-possible-effect-on-iga-secretion
#10
Juan Manuel Gutiérrez-Meza, Rosa Adriana Jarillo-Luna, Victor Rivera-Aguilar, Angel Miliar-García, Rafael Campos-Rodríguez
Stress stimuli affect the immune system responses that occur at mucosal membranes, particularly IgA secretion. It has been suggested that acute stress increases the levels of IgA and that sympathetic innervation plays an important role in this process. We herein explore in a murine model how acute stress affects the Th1/Th2/Treg cytokine balance in NALT, and the possible role of glucocorticoids in this effect. Nine-week-old male CD1 mice were divided into three groups: unstressed (control), stressed (subjected to 4h of immobilization), and stressed after pretreatment with a single dose of the corticosterone receptor antagonist RU-486...
May 1, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28431449/peripheral-and-central-glucocorticoid-signaling-contributes-to-positive-energy-balance-in-rats
#11
Tássia Karin Borba, Lígia Cristina Monteiro Galindo, Kelli Nogueira Ferraz-Pereira, Raquel da Silva Aragão, Ana Elisa Toscano, Omar Guzmán-Quevedo, Raul Manhães-de-Castro
The obesity epidemic has been the target of several studies to understand its etiology. The pathophysiological processes that take to obesity generally relate to the rupture of energy balance. This imbalance can result from environmental and/or endogenous events. Among the endogenous events, the hypothalamic-pituitary-adrenal axis, which promotes stress response via glucocorticoid activity, is considered a modulator of energy balance. However, it remains controversial whether the increase in plasma levels of glucocorticoids results in a positive or negative energy balance...
April 21, 2017: Hormone and Metabolic Research, Hormon- und Stoffwechselforschung, Hormones et Métabolisme
https://www.readbyqxmd.com/read/28404850/stress-hormones-epinephrine-and-corticosterone-selectively-modulate-hsv-1-and-hsv-2-productive-infection-in-adult-sympathetic-but-not-sensory-neurons
#12
Angela M Ives, Andrea S Bertke
Herpes simplex viruses 1 and 2 (HSV-1 and HSV-2) infect and establish latency in peripheral neurons, from which they can reactivate to cause recurrent disease throughout the life of the host. Stress is associated with exacerbation of clinical symptoms and induction of recurrences in humans and animal models. The viruses preferentially replicate and establish latency in different subtypes of sensory neurons, as well as in neurons of the autonomic nervous system that are highly responsive to stress hormones. To determine if stress-related hormones modulate productive HSV-1 and HSV-2 infection within sensory and autonomic neurons, we analyzed viral DNA and production of viral progeny after treatment of primary adult murine neuronal cultures with the stress hormones epinephrine and corticosterone...
April 12, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28402861/trpv1-regulates-stress-responses-through-hdac2
#13
Sung Eun Wang, Seung Yeon Ko, Sungsin Jo, Miyeon Choi, Seung Hoon Lee, Hye-Ryeong Jo, Jee Young Seo, Sang Hoon Lee, Yong-Seok Kim, Sung Jun Jung, Hyeon Son
Stress causes changes in neurotransmission in the brain, thereby influencing stress-induced behaviors. However, it is unclear how neurotransmission systems orchestrate stress responses at the molecular and cellular levels. Transient receptor potential vanilloid 1 (TRPV1), a non-selective cation channel involved mainly in pain sensation, affects mood and neuroplasticity in the brain, where its role is poorly understood. Here, we show that Trpv1-deficient (Trpv1(-/-)) mice are more stress resilient than control mice after chronic unpredictable stress...
April 11, 2017: Cell Reports
https://www.readbyqxmd.com/read/28393267/charting-the-perfect-storm-emerging-biological-interfaces-between-stress-and-stroke
#14
REVIEW
G Kronenberg, J Schöner, C Nolte, A Heinz, M Endres, Karen Gertz
A growing body of evidence demonstrates that psychosocial stress is an important and often underestimated risk factor for cardiovascular disease such as myocardial infarction and stroke. In this article, we map out major biological interfaces between stress, stress-related psychiatric disorders, and stroke, placing special emphasis on the fact that stress and psychiatric disorders may be both cause and consequence of cardiovascular disease. Apart from high-risk lifestyle habits such as smoking and lack of exercise, neuroendocrine dysregulation, alterations of the hemostatic system, increased oxidative stress, and inflammatory changes have been implicated in stress-related endothelial dysfunction...
April 9, 2017: European Archives of Psychiatry and Clinical Neuroscience
https://www.readbyqxmd.com/read/28392758/endoplasmic-reticulum-stress-perk-atf4-chop-pathway-is-associated-with-hypothalamic-neuronal-injury-in-different-durations-of-stress-in-rats
#15
Shanyong Yi, Weibo Shi, He Wang, Chunling Ma, Xiaojing Zhang, Songjun Wang, Bin Cong, Yingmin Li
The hypothalamus, which is the initial part of the hypothalamic-pituitary-adrenal (HPA) axis, plays a critical role in regulating stress in the central nervous system. The present study aimed to determine whether endoplasmic reticulum stress in hypothalamic neurons is differentially stimulated by varying durations of stress exposure, which ultimately leads to pathological changes in neurons by affecting HPA axis function. There is a need for better morphological evidence of the mechanisms involved in stress-induced neuron injury...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28359087/glucocorticoids-induce-bone-and-muscle-atrophy-by-tissue-specific-mechanisms-upstream-of-e3-ubiquitin-ligases
#16
Amy Y Sato, Danielle Richardson, Meloney Cregor, Hannah M Davis, Ernie D Au, Kevin McAndrews, Teresa A Zimmers, Jason M Organ, Munro Peacock, Lilian I Plotkin, Teresita Bellido
Glucocorticoid excess, either endogenous with diseases of the adrenal gland, stress, or aging or when administered for immunosuppression, induces bone and muscle loss, leading to osteopenia and sarcopenia. Muscle weakness increases the propensity for falling, which, combined with the lower bone mass, increases the fracture risk. The mechanisms underlying glucocorticoid-induced bone and muscle atrophy are not completely understood. We have demonstrated that the loss of bone and muscle mass, decreased bone formation, and reduced muscle strength, hallmarks of glucocorticoid excess, are accompanied by upregulation in both tissues in vivo of the atrophy-related genes atrogin1, MuRF1, and MUSA1...
March 1, 2017: Endocrinology
https://www.readbyqxmd.com/read/28344055/role-of-skeletal-muscle-glucocorticoid-receptor-in-systemic-energy-homeostasis
#17
REVIEW
Hirotoshi Tanaka, Noriaki Shimizu, Noritada Yoshikawa
Glucocorticoids (GCs) affect nearly every organ and tissue in the body, regulating diverse physiologic processes including energy homeostasis. The metabolic mission of GCs is to supply enough glucose into the circulation to fuel the brain and ensure survival of the organism under conditions of acute stress or starvation. Recent studies have revealed that GCs, via orchestration between multiple organs, physiologically elicit fine tuning of systemic energy metabolism.
March 24, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28319850/methylation-of-hpa-axis-related-genes-in-men-with-hypersexual-disorder
#18
Jussi Jokinen, Adrian E Boström, Andreas Chatzittofis, Diana M Ciuculete, Katarina Görts Öberg, John N Flanagan, Stefan Arver, Helgi B Schiöth
Hypersexual Disorder (HD) defined as non-paraphilic sexual desire disorder with components of compulsivity, impulsivity and behavioral addiction, and proposed as a diagnosis in the DSM 5, shares some overlapping features with substance use disorder including common neurotransmitter systems and dysregulated hypothalamic-pituitary-adrenal (HPA) axis function. In this study, comprising 67 HD male patients and 39 male healthy volunteers, we aimed to identify HPA-axis coupled CpG-sites, in which modifications of the epigenetic profile are associated with hypersexuality...
June 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28275717/the-arcuate-nucleus-a-site-of-fast-negative-feedback-for-corticosterone-secretion-in-male-rats
#19
Luis Leon-Mercado, Daniela Herrera Moro Chao, María Del Carmen Basualdo, Mitsuhiro Kawata, Carolina Escobar, Ruud M Buijs
Variations in circulating corticosterone (Cort) are driven by the paraventricular nucleus of the hypothalamus (PVN), mainly via the sympathetic autonomic nervous system (ANS) directly stimulating Cort release from the adrenal gland and via corticotropin-releasing hormone targeting the adenohypophysis to release adrenocorticotropic hormone (ACTH). Cort feeds back through glucocorticoid receptors (GRs). Here we show in male Wistar rats that PVN neurons projecting to the adrenal gland do not express GRs, leaving the question of how the ANS in the PVN gets information about circulating Cort levels to control the adrenal...
January 2017: ENeuro
https://www.readbyqxmd.com/read/28263830/repeated-corticosterone-injections-in-adult-mice-alter-stress-hormonal-receptor-expression-in-the-cerebellum-and-motor-coordination-without-affecting-spatial-learning
#20
Guillaume Harlé, Robert Lalonde, Coralie Fonte, Armelle Ropars, Jean-Pol Frippiat, Catherine Strazielle
Receptors for glucocorticoid (GR) and corticotropin-releasing hormone (CRH) are largely found in brain sensorimotor structures, particularly in cerebellum, underlining a potential role of stress hormones in the regulation of motor function. Since CRH is involved in neuroplasticity, known for its trophic effect on synapses, we investigated how manipulations in corticosterone serum levels can modulate the CRH system in the cerebellum and affect motor coordination. Corticosterone at doses of either 15 or 30mg/kg was injected in mice and the status of hormonal expression evaluated in cerebellum, hippocampus, and hypothalamus in undisturbed housing conditions or after different behavioral tests...
March 2, 2017: Behavioural Brain Research
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